"The basic design is that of a 3-piece burr GigaBurr which has been expanded to a 5x5x5 cube by gluing on edge and corner pieces. A complete computer analysis of all such designs was run over the winter of 2000-2001. The highest level found in this analysis is 6. (For comparison the highest level for a 3-piece burr is 8.) Three different level-6 disassembly sequences were found.
This was my souvenir puzzle at the 21st International Puzzle Party." -Bill Cutler